Pencil-sharpener



J. 0. BROOKBANK.

(No Model.)

PENCIL SHARPENER.

No. 458,654. Patented Sept. 1, 1891.

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((7. @mvMau/U g f all I UNITED STATES PATENT OFFICE.

JAMES O. BROOKBANK, OF DRIFTIVOOD, PENNSYLVANIA.

PENClL-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 458,654, datedSeptember 1, 1891.

Application filed January 23, 1891. Serial No. 378,825. (No model.)

T0 at whom it may concern:

Be it known that I, JAMES O. BROOKBANK, of Driftwood, in the county ofCameron and State of Pennsylvania, have invented certain Improvements inPencil-Sharpeners, of which the following is a specification.-

The aim of my invention is to produce asmall and inexpensive device forsharpening both lead and slate pencils.

1 and 2.

Referring to the drawings, A represents a metallic block or body havingin its upper side a deep longitudinal groove or channel a of diminishingwidth toward its bottom, or, in other words, with converging side walls.One of these walls is preferably vertical and the other inclined, asshown.

Through one side of the block is formed an opening b, and in thisopening is secured by screw 0 a fiat blade or cutter cl, one edge ofwhich is projected through and slightly beyond the inner face of thewall, somewhat after the manner in which a plane-bit is pro jectedbeyond the face of the stock or body.

The edge of the blade is arranged in a position inclined or oblique tothe vertical.

In making use of this cutter the end of the pencil is inserted andrepeatedly drawn through the channel in an inclined position, with itstapered end resting onone side against the vertical wall and on theother side against the opposite wall, subject to the action of theblade. After each cut the pencil is given a slight rotary motion. Bycontinuing these actions the wood and lead may be rapidly andsmoothlycut away without danger of fracturing the lead. The length and taper ofthe point may be varied as desired by simply changing the angle at whichthe pencil is presented to the groove. It will be noticed that the bladeacts with a draw or shear out, and that the point receives supportopposite the edge of the knife from the opposing wall. In the lower sideof the body I form a longitudinal. V-groove g, and in the surface ofthis groove I form a series of transverse obliquely-disposedcutting-teeth it, somewhat similar to those of a file. The teeth on eachside are parallel, but in oblique relation to those on the oppositeside. serve to reduce and sharpen the end of the pencil-lead or of aslatepencil drawn through the groove in an inclined position. The convergence and oblique relationship of the teeth on the opposite sides ofthe groove cause them to out rapidly and clearly.

As an additionalmeans of pointing pencils I propose to provide the bodyon its flat side with file-teeth, as shown in Fig. 1.

Having thus described my invention, what I claim is 1. In apencil-sharpener, the body having the V-groove therein, and thecutting-blade projected through one of the walls of said groove.

2. In a pencil'sharpener, the body having the V-groove therein, incombination with the cutting-blade having its cutting-edge extendedthrough one side of the groove in a position oblique to its. length.

3. The pencil-sharpener having the internal groove, the cutting-bladetherein, and the outside groove with the series of converging teeththerein.

In testimony whereof I hereunto set my hand, this 8th day of January,1891, in the presence of twoattesting witnesses.

JAMES O. BROOKBANK.

Witnesses:

GEO. L. SMITH, M. I. WHITING.

They

